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Chip in 1990 C2

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Old 08-29-2004, 08:17 PM
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Jeremy Pinsly
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Default Chip in 1990 C2

Hello everyone,

I am relatively need to the Porsche world. I am ready to make my first modification to my car. I want to replace the stock DME chip with a Steve Wong chip (911chips.com---I have no affiliation). My DME unit is model 0-261-200-450.

Does anyone have any experience with this chip? If not, what do you recommend? I have also looked at the FVD chip and am strongly considering it.

I also plan on replacing the stock exhaust....either with a Fabspeed single outlet cat-back or a primary bypass.

I would appreciate feedback on any experiences you may have with these items.

Thanks,
Jeremy
Old 08-29-2004, 08:29 PM
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Bill Gregory
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Jeremy,

Please use the search facility, as these and other mods of been discussed over recent years.

First thing to do is disconnect your battery, and after reconnecting it, drive the tar out of your 964 for 15 minutes or so. That will reset the memory and you may notice some performance improvement. If you need a chip, suggest that you don't get one that raises the rev limit. This is one way chip tuners exact claims of greater performance, however, starting with the 3.2L engine, Porsche started using smaller diameter rod bolts, which have been known to let go at revs higher than the factory designed them for. Also, some chip tuners tune for higher octane gasoline, so make sure you know what the assumption is, and that you can get it.

On the exhaust, you can disconnect your secondary muffler to get an idea if you'll like the sound of a primary-only system . Drilling holes in your airbox cover, or cutting most of the airbox cover away to expose the air filter will add some very nice tones to the exhaust. Not sure it adds any hp, but it sure sounds like it when you get on the gas. I'd replace whichever muffler save the most weight. I believe you'll find that's the primary muffler, and removing weight at the rear end of body is a good thing.
Old 08-29-2004, 09:44 PM
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joey bagadonuts
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Hey Jeremy and welcome!

Ditto what Bill said. Also, why don't you tell us a little about your C2. Coupe, cab or targa? Auto or tip? Primary use, i.e. daily driver or weekend car? What color is it? Do you plan to track it? It's always useful to give some context. I think you'll get better responses that way.

So, why do you want to replace the chip as your first mod? Most folks start with wheels (if they have the original 16" D90's) and then replace the mirrors to the later style "aero" mirrors. BTW, neither of these mods is cheap but they definitely make a big difference in your car's looks.

As for chips, they really don't do a lot for our naturally aspirated cars. Yes, I have one and for $400, the 5hp gain is probably not the greatest return on investment. If you really want to make your car go, strip it of all the excess weight. Search the archives with terms like "diet" or "carbon fibre" for specifics.
Post a pic, too, if you have a second. Welcome again!
Old 08-29-2004, 10:57 PM
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Jeremy Pinsly
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Default My car with pics

Hey all,

My baby is a 1990 C2 Cab, Guards red with cashmere interior, 5 speed.
The car is pretty much stock except for the following:

- poweflow air intake
- sound system (NAK CD-400, Focal 130KP speakers up front, Focal 100CA speakers in back, Car Audio Innovations custom rear base enclosure holding 2 JL8W3 8" subs, Alpine MRV-F450 amp

I bought the car with ~93000 miles a few months ago (car was in NJ, I live in Florida). I'm not using it as a daily driver, nor will it ever see a track.

The reason why I want to chip it is because I used to have an Audi TT that I did chip. I noticed a tremendous amount of power increase (torque) at more usable RPMs, and it just made the car more fun to drive.

In terms of the cars looks, I like the classic style of the G50's and 964s. I may change out the wheels at some point in the future, but for now, a bit more pep when I stomp on the gas is what I need.

I'm not completely sure I want to mess with the exhaust. After spending about $3000 in a new sound system, I want to make sure I can still hear it with the top down when I'm flying down the highway at 90 mph!

Thanks again for your suggestions......Enjoy the pics

http://cgi.ebay.com/ebaymotors/ws/eB...category=10156



1990 C2 Cab
1998 Volvo V70
2000 HD Road King with 95" engine
Old 08-30-2004, 12:38 AM
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joey bagadonuts
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Congrats! Nice looking car.

Regarding the chip, I have not heard of one which will make a noticeable difference in low to mid range torque. I also checked out the http://www.911chips.com website and I didn't see any 964 plots but the 911 results they did include showed that the greatest improvements were realized by using their chip in conjunction with an exhaust modification. So their claim of 6-8% power gains (~20hp for our cars) would need to be revised downward for just the chip, right?

I'm pretty certain you'll be disappointed with a chip upgrade. Unlike your Audi, the 964 torque curve can't be transformed that easily ... believe me, I've tried!

I think it's a matter of expectations. These cars don't have that big, low-end pull like an American V8. The heart of the torque band lies between 4,000 rpm and the red line. They're not the fastest street racers but if you ever need to make a quick pass, well, you know how well these cars can do that.
Old 08-30-2004, 10:43 AM
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Randall G.
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Yup, Jeremey, the Audi TT is turbo charged (not including the recently introduced 3.2L engine), and responds very well to chipping. Joey was suggesting the same when he said chips don't do much for our N/A cars.

Welcome to the forum!
Old 08-30-2004, 11:16 AM
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Arjan B.
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Welcome to the 'famous club' !
Old 08-31-2004, 12:12 AM
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Default Rennsport Systems

Jeremy,

My advice for you is to contact Steve Weiner at Rennsport Systems (503-244-0990) for a chip and exhaust. He is very knowledgable on the 964 and is a great person to talk about Porsches. He helped me out setting up my car. I have no affiliation with him. He was just very helpful, and gave me a lot of information. As far as chips a lot of manufacturers such as Authority, and Powerchip take the rev limiter off to say that their chip out performs others. Steve could map you a chip, and he leaves the rev limiter on. I have a Monty cat back exhaust and love the sound of it. I had the fabspeed and was dissapointed, but that is just my opinion.
Old 08-22-2005, 06:41 PM
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C4porsche964
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Question DME reprogram/chip

Originally Posted by Bill Gregory
Jeremy,

Please use the search facility, as these and other mods of been discussed over recent years.

First thing to do is disconnect your battery, and after reconnecting it, drive the tar out of your 964 for 15 minutes or so. That will reset the memory and you may notice some performance improvement. If you need a chip, suggest that you don't get one that raises the rev limit. This is one way chip tuners exact claims of greater performance, however, starting with the 3.2L engine, Porsche started using smaller diameter rod bolts, which have been known to let go at revs higher than the factory designed them for. Also, some chip tuners tune for higher octane gasoline, so make sure you know what the assumption is, and that you can get it.

On the exhaust, you can disconnect your secondary muffler to get an idea if you'll like the sound of a primary-only system . Drilling holes in your airbox cover, or cutting most of the airbox cover away to expose the air filter will add some very nice tones to the exhaust. Not sure it adds any hp, but it sure sounds like it when you get on the gas. I'd replace whichever muffler save the most weight. I believe you'll find that's the primary muffler, and removing weight at the rear end of body is a good thing.
My car has an Autothority MAF and chip and B&B exhaust (no secondary). When you disconnect the battery and drive hard, are you re-programming the chip, or doing something else? Will this proceedure have any effect with an aftermarket chip?

Jerry
Old 08-22-2005, 11:00 PM
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Colin 90 C2
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I would do the other mods fiirst before you chip. The chips can be tuned for exhaust changes and LWT flywheel, and octane.

I have a chip from Cyntex. Paul will program to what changes you have or anticipate. I have no affliation except being a happy customer. I have heard tha Steve Wong is also very good. I believe that Steve programs for lower octane California gas.

I noticed a seat of the pants increase in low to mid range torque and better driveability. Also the step change from the resonance valve is not as pronounced as stock. Unfortunately I do not have stock dyno charts but my current setup shows a pretty smooth torque and Hp curve.

By the way, welcome to the board. Be careful of that slippery slope. Before you know it you will be doing something stupid like adding NOS and looking at turbocharging options.

Colin



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